function merge($segment)
{
if ($this->contains($segment)) {
for ($i = $this->getEnd(); $i <= $segment->getEnd(); $i++) {
$this->text[$i] = $segment->text[$i];
}
$new_segment = new Segment($this->text, $this->getStart(), $segment->getEnd());
$new_segment->setNeedles(array_merge($this->needle_positions, $segment->needle_positions));
return $new_segment;
}
return False;
}